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console: nicer initial screen

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Now that we have a function to create a fancy DisplaySurface with a
message for the user, to handle non-existing graphics hardware, we
can make it more generic and use it for other things too.

This patch adds a text line to the in initial DisplaySurface, notifying
the user that the display isn't initialized yet by the guest.

You can see this in action when starting qemu with '-S'.  Also when
booting ovmf in qemu (which needs a few moments to initialize itself
before it initializes the vga).

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2013-04-25 12:10:45 +02:00
parent afff2b15e8
commit 521a580d23
1 changed files with 11 additions and 8 deletions
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19
ui/console.c
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@ -1271,19 +1271,18 @@ DisplaySurface *qemu_create_displaysurface_from(int width, int height, int bpp,
return surface;
}
static DisplaySurface *qemu_create_dummy_surface(void)
static DisplaySurface *qemu_create_message_surface(int w, int h,
const char *msg)
{
static const char msg[] =
"This VM has no graphic display device.";
DisplaySurface *surface = qemu_create_displaysurface(640, 480);
DisplaySurface *surface = qemu_create_displaysurface(w, h);
pixman_color_t bg = color_table_rgb[0][COLOR_BLACK];
pixman_color_t fg = color_table_rgb[0][COLOR_WHITE];
pixman_image_t *glyph;
int len, x, y, i;
len = strlen(msg);
x = (640/FONT_WIDTH - len) / 2;
y = (480/FONT_HEIGHT - 1) / 2;
x = (w / FONT_WIDTH - len) / 2;
y = (h / FONT_HEIGHT - 1) / 2;
for (i = 0; i < len; i++) {
glyph = qemu_pixman_glyph_from_vgafont(FONT_HEIGHT, vgafont16, msg[i]);
qemu_pixman_glyph_render(glyph, surface->image, &fg, &bg,
@ -1305,6 +1304,8 @@ void qemu_free_displaysurface(DisplaySurface *surface)
void register_displaychangelistener(DisplayChangeListener *dcl)
{
static const char nodev[] =
"This VM has no graphic display device.";
static DisplaySurface *dummy;
QemuConsole *con;
@ -1323,7 +1324,7 @@ void register_displaychangelistener(DisplayChangeListener *dcl)
dcl->ops->dpy_gfx_switch(dcl, con->surface);
} else {
if (!dummy) {
dummy = qemu_create_dummy_surface();
dummy = qemu_create_message_surface(640, 480, nodev);
}
dcl->ops->dpy_gfx_switch(dcl, dummy);
}
@ -1590,6 +1591,8 @@ QemuConsole *graphic_console_init(DeviceState *dev, uint32_t head,
const GraphicHwOps *hw_ops,
void *opaque)
{
static const char noinit[] =
"Guest has not initialized the display (yet).";
int width = 640;
int height = 480;
QemuConsole *s;
@ -1605,7 +1608,7 @@ QemuConsole *graphic_console_init(DeviceState *dev, uint32_t head,
&error_abort);
}
s->surface = qemu_create_displaysurface(width, height);
s->surface = qemu_create_message_surface(width, height, noinit);
return s;
}